Diaphragm Sealed Pressure Gauge are designed and recommended to isolate the measuring system of a pressure gauge from corrosive, pasty or dangerous fluid depending on the viscosity, pressure, temperature and solidification of a particular process medium. The Pressure Gauge has been filled under vacuum with the transmitting liquid. The Pressure Gauge is used to achieve maximum flexibility and linearity with sufficient stroke to provide the displacement needed to produce full deflection of the sensing element. Diaphragm Sealed Pressure Gauge is argon arc welded to the top chamber to ensure a perfect selling without leakage.